Disclosures of Fair Values of Financial Instruments - Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Available-for-sale securities:
Total available-for-sale securities	$ 1,280,108	$ 1,076,883
Equity securities, at fair value	3,620	4,588
U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies
Available-for-sale securities:
Total available-for-sale securities	142,367	144,080
Obligations of States and Political Subdivisions
Available-for-sale securities:
Total available-for-sale securities	287,012	280,633
Corporate bonded debt
Available-for-sale securities:
Total available-for-sale securities	27,908	27,504
Fair Value, Recurring
Available-for-sale securities:
Total available-for-sale securities	1,280,108	1,076,883
Equity securities, at fair value	3,620	4,588
Loans held for sale, fair value	6,724	5,203
Derivative assets: interest rate swaps	1,806	1,728
Total assets	1,292,258	1,088,402
Derivative liabilities: interest rate swaps	1,480	1,247
Fair Value, Recurring \| U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies
Available-for-sale securities:
Total available-for-sale securities	142,367	144,080
Fair Value, Recurring \| Obligations of States and Political Subdivisions
Available-for-sale securities:
Total available-for-sale securities	287,012	280,633
Fair Value, Recurring \| Mortgage-backed Securities
Available-for-sale securities:
Total available-for-sale securities	822,821	624,666
Fair Value, Recurring \| Corporate bonded debt
Available-for-sale securities:
Total available-for-sale securities	27,908	27,504
Quoted Prices in Active Markets for Identical Assets (Level 1)
Available-for-sale securities:
Total available-for-sale securities	0	0
Equity securities, at fair value	3,620	4,588
Loans held for sale, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring
Available-for-sale securities:
Total available-for-sale securities	0	0
Equity securities, at fair value	3,620	4,588
Loans held for sale, fair value	0	0
Derivative assets: interest rate swaps	0	0
Total assets	3,620	4,588
Derivative liabilities: interest rate swaps	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring \| U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies
Available-for-sale securities:
Total available-for-sale securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring \| Obligations of States and Political Subdivisions
Available-for-sale securities:
Total available-for-sale securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring \| Mortgage-backed Securities
Available-for-sale securities:
Total available-for-sale securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring \| Corporate bonded debt
Available-for-sale securities:
Total available-for-sale securities	0	0
Significant Other Observable Inputs (Level 2)
Available-for-sale securities:
Total available-for-sale securities	1,267,371	1,074,124
Equity securities, at fair value	0	0
Loans held for sale, fair value	6,724	5,203
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring
Available-for-sale securities:
Total available-for-sale securities	1,267,371	1,074,124
Equity securities, at fair value	0	0
Loans held for sale, fair value	6,724	5,203
Derivative assets: interest rate swaps	1,806	1,728
Total assets	1,275,901	1,081,055
Derivative liabilities: interest rate swaps	1,480	1,247
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring \| U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies
Available-for-sale securities:
Total available-for-sale securities	142,367	144,080
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring \| Obligations of States and Political Subdivisions
Available-for-sale securities:
Total available-for-sale securities	287,012	280,633
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring \| Mortgage-backed Securities
Available-for-sale securities:
Total available-for-sale securities	812,843	624,666
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring \| Corporate bonded debt
Available-for-sale securities:
Total available-for-sale securities	25,149	24,745
Significant Unobservable Inputs (Level 3)
Available-for-sale securities:
Total available-for-sale securities	12,737	2,759
Equity securities, at fair value	0	0
Loans held for sale, fair value	0	0
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring
Available-for-sale securities:
Total available-for-sale securities	12,737	2,759
Equity securities, at fair value	0	0
Loans held for sale, fair value	0	0
Derivative assets: interest rate swaps	0	0
Total assets	12,737	2,759
Derivative liabilities: interest rate swaps	0	0
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies
Available-for-sale securities:
Total available-for-sale securities	0	0
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Obligations of States and Political Subdivisions
Available-for-sale securities:
Total available-for-sale securities	0	0
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Mortgage-backed Securities
Available-for-sale securities:
Total available-for-sale securities	9,978	0
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Corporate bonded debt
Available-for-sale securities:
Total available-for-sale securities	$ 2,759	$ 2,759

Fair value portion of asset recognized for present right to economic benefit.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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